Re: Was Basic Stamp RSG--Now Magnetic Prox Sensor for RSG

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Jeremy Scott by way of Terry Fritz <teslalist-at-qwest-dot-net>" <supertux1-at-yahoo-dot-com>

Just a suggestion,

You may want to put two sensors on your disc to
keep it from vibrating too much :)

Either that or make sure the magnet is really small :)
I'm thinking of drilling a hole slightly smaller
than a square magnet, pounding it in there, and
sealing both sides with epoxy so that the disc is
flush.

The only concern is that the EM fields generated by
the coil might severely mess with the hall effect
sensor. That may be desireable in a different sensor:
one that measures the RF output of the tank.



--- Tesla list <tesla-at-pupman-dot-com> wrote:
 > Original poster: "David Sharpe by way of Terry Fritz
 > <teslalist-at-qwest-dot-net>" <sccr4us-at-erols-dot-com>
 >
 > Hi Ken
 >
 > Tesla list wrote:
 >
 >  > Original poster: "Crow Leader by way of Terry
 > Fritz
 > <teslalist-at-qwest-dot-net>" <tesla-at-lists.symmetric-dot-net>
 >  >
 >  > I've made ghetto sensors by wrapping like 50
 > turns of magnet wire around a
 >  > regular 1/4" bolt and taping a magnet to whatever
 > is spinning. It actually
 >  > costs, nothing.I don't have any waveforms here,
 > but the pulses were pretty
 >  > fast and clean, and of a upto a few volts.
 >  >
 >  > KEN
 >  >
 >
 > That is a fantastic idea!  I had never considered
 > doing that
 > for a "Budweiser" Hall-effect, but makes good sense.
 >  Like
 > a magneto on a lawn-mawer/weedeater.  May be a good
 > way for me to track 0 deg. on my rotary while
 > running or get
 > a handle on real RSG rpm while running.  A couple of
 > nylon
 > washers, a locknut and a plastic sleeve to protect
 > the wire
 > insulation and you're set.  Thanks again!
 >
 > Regards
 > Dave Sharpe, TCBOR/HEAS
 > Chesterfield, VA. USA
 >
 >